My friends at have many hard to find parts in stock as well as custom kits for your Sea Doo plus they ship all over the world so check them out for your Sea Doo parts needs!
Parts Inventories
from overstocked or closing Sea Doo shops. If you have parts or know of a Sea Doo dealer in your area that is closing, contact me at with the details.

Blown or wrecked Sea Doo watercraft in the Ohio vicinity. If you have one, contact me with description and price.

Have you had a bad experience with a dealer, repair shop, or engine rebuilder? If so, now you can post your experiences here. Hopefully this page will help others avoid the same fate!
OSDparts Items

Complete Carb
Rebuild Kits
For Sea Doo

Is your LCD
Hard to read?

Check out this
Gauge repair kit!

Have VTS on your
1995-up Sea Doo?

NEW Button Kit
Is now available!

Fuel Filter Element

Fits Most 2 Stroke
Carb Sea Doos

1995-1997 Sportster MPEM Conversion
1995 Speedster MPEM Conversion
1996 Speedster MPEM Conversion
1997 Speedster MPEM Conversion
1997 Challenger MPEM Conversion

Complete Pump Housing Kits!
DESS & Other Switches
Driveline Seal Assemblies
SeaDoo Tool Rental!
VTS Boot Upgrade Kit
Anti-Rattle Kits For Older Doos !

Jet Pump Rebuilding Services

New Parts (OSD)

Accessories & More
Fuel/Air Parts
Nuts Bolts Etc…
Misc. Parts

Used Components Parts List

Technical Info

Non-Wired MPEM Test

787/947 CB Reservoir Oil
1995-2004 VTS Test Info
4 Stroke Fault Codes
1995 & UP VTS Info
Fuel Economy Chart
Jetboat Engine Ref.
PWC Engine Ref. Chart
Choke Cable Info Chart
Coil Reference Chart
Crankshaft Exploded Views
Driveshaft ID Chart
Engine Torques Specs
Fuel Baffle Chart
Gauge Information
Impeller Info Chart
Kit Info Chart
Mikuni Carb Specs
Mikuni Test Info
MPEM Ref & Prog.
MPEM Test Info
My Opinion on Oil…
Part Numbers List
Rotax Case ID
Rotax Engine Info
Sea Doo Models 1988-2010
Sea Doo Paint Codes
Seat Reference Chart
SD Spark Plug Info
029/358 VTS Module Test
Water Flooded 2 Stroke
Wear Ring Removal

Technical Info

Sea Doo Tool Rental!

Sea Doo Tips

To avoid expensive
electrical system damage
jump start your ski
with a running vehicle!!

Change your pump oil
every 50 hours and
you'll save money in
the long run !

Battery dying in your Trim
equipped 1995 up Sea Doo?
Disconnect your VTS unit.
If that fixes the problem
the module probably has
failed due to moisture.

Every time you have
your engine compartment
open, grab the motor and
give it a pull to make sure
your motor mounts are in
good shape. Broken mounts
can cause driveline and pipe
problems if not caught early!

Save money and time
by doing repairs yourself
instead of using a dealer!

The area above is always changing so check back often as links are added.

787 & 947 Counterbalance Oil Check

The 787 and 947 engines have a counterbalance oil reservoir that the oem Sea Doo manual says needs to be checked every 50 hours.

The 787 though has what I consider a poor design since there is no seal between the crank main bearing next to the cylinder and the crank counterbalance gear. Only a Labyrinth washer separates the counterbalance reservoir from the rear of the crankcase. In a short time after any oil is added, oil in the counterbalance area on a 787 will dissipate. I personally add oil whenever convenient to the reservoir to prolong gear and bearing life. Is it necessary? I'm sure people debate that but I know from my Mechanical Engineering background that meshing gears and bearings will last much longer in gear lube vs gas with a little oil in it. So add some oil if you happen to have access to the plug (if yours has one) but I wouldn't go to the trouble of taking things apart just for that. Also note that if you get water in the crankcase of a 787, it will also get into the counterbalance reservoir so you would need to remove the drain plug under the reservoir and get the water out. If not, your engine won't be around for long! (see the last picture below)

As for the 947 (951), the manual doesn't tell you how to check the counterbalance oil or how high the oil should be, but when I get that info, I'll add it!

Below you can see what plug or fitting needs to be removed to add oil to the reservoir.

The manual states the 787 & 787 RFI should have 30 mL (1 oz) SAE 30 motor oil in the reservoir.
The manual states the 947 & 947 DI should have 40 mL (1.35 oz) Jet Pump Synthetic Oil or standard gear oil in the reservoir.
(note that 1995-1996 787 don't have a check/fill plug. Oil is added when the engine is assembled and that's all you get)

In my opinion, on the 947 (951) just adding oil especially to low/old oil seems like a bad fix. The oil not only should be checked, but should be changed maybe every 200 hours. If you have your engine out, you might consider adding a fitting to the lowest point of the reservoir so oil can be drained.
I may work on a kit to offer for this one soon if demand warrants it!

787/787 RFI

947 Carb

947 DI

Counterbalance shaft failure probably due to water in the reservoir.
If the 787 had a separate reservoir, this wouldn't have happened!

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